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RCCBs are essential for the early detection and interruption of residual currents, overloads and short circuits. They ensure greater safety in electrical systems, protect against fires and also ensure that people are protected from dangerous electric shocks. You can find numerous residual current circuit breakers from various manufacturers in our store.

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What is an RCCB?

An RCCB is a combination of a residual current circuit breaker (RCCB) and a miniature circuit breaker (MCB). The residual current circuit breaker is also known as an RCBO, which stands for "Residual Current Breaker with Overcurrent protection". This device can be used to protect electrical systems and increase safety. This is because the residual current circuit breaker offers protection against residual currents or residual currents and also against overloads and short circuits.

Advantages of an RCCB

  • Comprehensive protection: An RCCB provides protection against residual currents, overloads and short circuits 
  • Greater safety: For this reason, safety for people, appliances and property is also increased 
  • Simple installation: Thanks to the combination of functions, only one device needs to be installed. This also simplifies maintenance and troubleshooting
  • Cost savings: The combined functionality of the protective device also reduces costs. Only one device needs to be purchased.
  • High flexibility: The residual current circuit-breaker and miniature circuit-breaker is available in various types with different rated currents, rated residual currents and tripping characteristics, which are suitable for a wide range of applications.

The difference between RCDs and RCCB

The main difference between an RCD and an RCCB is that the RCCB offers an additional function. The task of an RCD or residual current circuit breaker is to protect against residual currents that can occur through direct contact with live parts or earth faults. In such a case, the RCD detects the imbalance and interrupts the power supply to protect people from electrical accidents and reduce the risk of fire. It is also known as an RCD. RCD stands for "Residual Current Device". 

In addition to this function, the RCD also has integrated line protection. This means that it also protects against overloads and short circuits. If a residual current is detected, it interrupts the power supply. If the current flow exceeds the maximum permissible value, it also interrupts the circuit. The same applies in the event of direct contact between live conductors.

What you should look out for when buying an RCCB

If you want to buy an RCCB, you should pay attention to various aspects. We have summarized the most important points here: 

  1. the appropriate rated residual current: this indicates when the switch trips. For personal protection, the usual value is 30 mA. For fire protection, the value 100 mA or 300 mA is most common. 
  2. rated current: The rated current must also be taken into account. You select this according to the maximum load to be protected by the switch. This is usually between 6 A and 40 A. You should also take into account the sum of the operating currents of all devices connected to the circuit. 
  3. note the number of poles: The RCCB is available in different versions such as 1-pole, 1-pole + N, 2-pole, 3-pole or 4-pole variants. Pay attention to the type of electrical system for which you want to use a residual current circuit-breaker in order to select the correct type. 
  4. tripping characteristic: This describes the overload or short circuit at which the switch trips. For example, there are types B, C and D. 

You should also make sure that the RCCB you select can be used with the type of distribution box.

Buy RCDs at WATT24

At WATT24 you will find a wide range of RCDs from various manufacturers in the online store. Choose your favorite and order it easily and conveniently online. We will deliver your desired items quickly and promptly directly to your doorstep. Do you need other electrical installation and lighting technology products? Then you've come to the right place. 

WATT24 focuses on first-class quality, reliability and outstanding customer service to make your search for the ideal product as easy as possible. Choose WATT24 and benefit from a wide range of advantages, such as 

  • Fast delivery - Your order will be with you in a flash without long waiting times. 
  • Simple and secure shopping process - Our ordering process is not only easy to use, but also secure to ensure your protection at all times. 
  • Extensive range - Browse through our wide range of products tailored to your individual requirements.
  • Top quality from top brands - We offer you a selection of exclusively first-class products from renowned manufacturers. 

Find the right RCCB now and buy it directly online at WATT24!

FAQ: Frequently asked questions about the RCCB

What is the tripping time? 

The tripping time of an RCCB indicates the time that elapses between the detection of a fault and the actual interruption of the circuit. The tripping time is usually specified in mA. For personal protection, less than 30 milliseconds are important, i.e. 30 mA. 

Which devices should be protected with RCCBs?

It makes sense to protect numerous devices and applications with an RCCB. These include, for example, electrical installations in damp or wet areas, electrical heating appliances, garden equipment, outdoor lighting, workshops, garages, large household appliances and more. 

What is a top-hat rail?

The top-hat rail is the standard mounting system often used for installing electrical devices in distribution boxes. It allows devices such as RCDs and RCCBs, relays and other electrical components to be securely fastened.

What do subdivision units indicate? 

Divider units, TE for short, are a measure of the width of devices that are installed in distribution boxes and similar. The dimension is adapted to DIN rail mounting, which is often used to attach electrical components. This allows the appropriate size and the required space to be matched. 

Are there different types of RCDs? 

Yes, there are various residual current circuit-breakers with integrated line protection that can be used as a protective device. The types can react to different types of residual currents. 

What is the rated current? 

The rated current is the maximum current that a device or protective device can carry continuously without damage occurring.